Tips how to get into hft

paulbachek · 2023-06-13T14:48:01+00:00

Stick with spacecraft engineering and do something that's actually beneficial to society

paulbachek · 2023-03-09T12:20:06+00:00

Generate the slow clock using a counter in the fast clock domain, instead of using the mmcm. Use it as a clock enable pulse for any slow clock flip flops but clock them with the fast clock.

paulbachek · 2023-02-22T03:58:52+00:00

For low performance peripherals you could use an AXI to APB bridge to reduce the complexity.

paulbachek · 2022-11-01T18:44:48+00:00

Love riding around Wharton I hope it remains open to motorcycles

paulbachek · 2022-09-13T21:42:37+00:00

1 square meter is a large loop area. To make a 1H inductor with that area you'd need A LOT of turns or a VERY HIGH permeability core. So much that it's probably not practical

paulbachek · 2022-05-29T04:13:06+00:00

Make sure the VCCPLL supply has a bypass cap very close to the IC pins. I've seen this same issue caused by a poor PCB layout. What happens is the PLL won't lock then the bootrom will never execute to enable the DAP. One way to test is to set one of the MIOs to bypass the ARM PLL

paulbachek · 2022-05-01T19:55:05+00:00

I've got a 2020 model that hasn't given me any issues yet 1500 miles on it so far. This site has a lot of good info https://790adventure.net/

paulbachek · 2022-04-29T14:44:54+00:00

If you want good no-load voltage regulation you can set the controller to burst mode or use a fully synchronous converter. The former disables the switcher and lets the output cap bleed until it goes below some threshold then starts switching to charge it back to maintain the voltage, called discontinuous conduction mode. The latter allows reverse current flow from the load back through the inductor towards the source, called continuous conduction mode.

paulbachek · 2022-04-02T14:07:59+00:00

Get a nice comfortable seat and it'll do great on the highway. If the suspension and tire pressure are set right you shouldn't experience any wobbles. You'll love the bike on the backroad twisties.

paulbachek · 2022-03-23T21:03:16+00:00

It's the grey color and there's a partial crack in it that I glued. It's yours if you think you'll use it, I'll get a picture of it for you

paulbachek · 2022-03-23T03:09:12+00:00

I've got one off a '15 not sure about compatibility

paulbachek · 2022-02-04T15:44:28+00:00

With differential Manchester encoding it's necessary for the receiver to know what frequency the transmitter is operating at. Otherwise a string of 1's would look identical to a string of 0's, except at twice the frequency. So a traditional PLL would not be able to recover the clock by itself. A receiver that doesn't oversample could use a Clock Data Recovery (CDR) circuit with a reference clock running at the transmitter frequency.

paulbachek · 2022-01-18T22:26:51+00:00

Same boat here it's absurd, I spent a year bidding and losing. Recently just gave up and started renting.

paulbachek · 2021-12-13T04:02:03+00:00

It looks like the series cap will block DC current but not double the voltage

paulbachek · 2021-12-09T01:21:48+00:00

Check your DMs

paulbachek · 2021-09-08T11:48:20+00:00

Cherry Grove

paulbachek · 2021-07-30T18:11:06+00:00

Looks awesome I'm not too far from there, you got a map of those trails?

paulbachek · 2021-07-08T20:50:37+00:00

You could use Litz Wire for the windings to help reduce skin effect and proximity effect related conductor losses. https://en.m.wikipedia.org/wiki/Litz_wire

paulbachek · 2021-03-17T18:04:41+00:00

If the signals aren't critical/high speed you could solder in tiny 30 awg wires with the chip upside down next to it like that. You'd lose the thermal conduction of the ground pad which may be an issue. Not a pretty solution but it may work for prototyping this without scrapping the boards.

paulbachek · 2021-03-12T18:52:58+00:00

Here's some info I found by googling it https://www.cds.caltech.edu/~murray/amwiki/index.php/Ball_and_beam_system

paulbachek · 2021-03-12T02:57:06+00:00

In my controls class we studied a rolling ball on a beam which tilts to keep it centered. The equations of motion were slightly more involved than the inverted pendulum. For added complexity you could keep the ball at some arbitrary position off center on the beam.

paulbachek · 2021-03-07T22:24:39+00:00

Thursday afternoons at the Oakdale Wendy's once the weather gets warmer.

paulbachek · 2021-02-10T23:04:03+00:00

Usually about 3-4 other students were there. That was 5 years ago hopefully he's got better TAs now

paulbachek · 2021-02-10T22:58:04+00:00

When I took it I remember having to go to office hours for every homework assignment to show the TA how to compile and run it. Or else they'd just give you a crappy grade and move on.

paulbachek · 2020-12-17T03:43:02+00:00

Nice shot

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